Harddisk(s) not visible anymore

I installed the Acronis Disk Director Suite trial along with the OS selecter today under Windows Vista 64 bit and after completing the installation I can no longer access my D drive cause it tells me it needs to be formatted and my E drive is completely unvisible, what can I do to revert back to my old state (except for system restore, tried that) before the program was installed?

Thanks for the swift reply. I tried uninstalling both, the problem is still there, now my D: drive is visible but it tells me I need to do a format to use it, the D: and E: drives are diffirent physical drives. I've already made a call to the shop owner where I bought my pc, going there later today, I hope I can get this fixed, it would be disastrous if I lost all that data.